Door control device



J. C. MCCUNE DOOR CONTROL DEVICE Filed May 29. 1931 'Augn 14, 1934.

Patented Aug. 14, 1934 1,969,813

UN1TED-sTrEjs1 fear-ENTortica i WestinghouseAir BrakeCompany,rWilmerding, Y Pa., a corporation o f Pennsylvania Application May29; 1931, serialnasioei ,z claims.. (01.363-,f5.1).`

This invention relates to uidpressurebrakes V"Ihe door selector valve device comprises a and more particularly to a safety controlbrake rotary valve30 contained in a chamber 18 and equipment having a brake valve devicefor conadapted to be turned to various door controlling trolling the brakes and the doors of a'car. j positions byy means of a handle 19 which is opera- Particularly on cars in electric traction service tively connected to said rotary valve by means of .60

a plurality of car doors are provided, such as an a'driving shaft 20.

exit door, an entrance door, and a treadle oper'- I'he entrance'door engine is of the well known ated door which under lcertain conditionsis adapt'- vtype vcomprising a piston 21 having at one side a edtobe opened by `a passenger in the car, Aand chamber 22, apiston'23'h'aving at one side a chamthe .principal object of my invention is to provide ber24,}and a stem 25 carried byfan'd movable with G5 a safety car control equipment having `improved said pistons for opening and .closing'the car enmeans for controlling the operation of a treadle trance'door (not shown). l y'Ihepiston Vchamber door.l V Q 22 is connectedk to .a .door .opening pipe 26 leading In the accompanying drawing; Fig. 1 is ajdiato the seat of theselector valve rotary valve 30, grammatic view, mainly. in section, of a safety and the piston chamber 24 is connected to adoor 70 carcontrol equipment embodying my invention; closing pipe 27 leading tothe seat of said rotary 2 isadiagrammaticdevelopment viewjshowvalve... I ing the connections establishedin'various p'osifTheeXit doorengine'may'be of the same contions of, therotary valveof the, brake valvedevice struction as the ventrance Vdoor engine 5 and has y shown in Fig. 1 ;f and Fig. 3 is a diagrammatic the piston chamber 22 'connected to a door open- 75 development view, showing `the connections estabing pipe 28 leading to the seat of the rotary valve lished invarious positions of the rotary valve of 30 and the piston chamber24 connected to a door the door selector valve device shown in Fig. 1. closingpipe 29 leadingi tothe seat of said rotary As shown in the drawing, the safety car control valve. L k equ'pment comprises a brakevalve device 1, hav- The treadle controlled door .engine 7 may be 'of 30 ing preferably associated therewith a door selector any type-'but as shown in the drawing is of the -valve device 2,' va brake cylinder 3,.a fluid pressure diierential type and comprises a piston 31 having reservoir 4,l an entrance doorengine 5, anexit Natfone lsidea chamber 327,' a piston 33 ofsmaller .door engine 6, a treadle door engine 7, a ca r door area than. Vpiston 31 and connected thereto by 30 8 operative by the tre'adle door engine7, a treadle lmeans of a rod.3 4. The piston 33 has at one side S5 door engine control valve device 9 and means, Va chamber 35 open to the atmosphere, and interpreferably in the form of a foot operated vtreadle mediate the pistons 32 .and 33 is a chamber 36. .10'for operating'thelvalve device 9. i Projecting from the piston. 33 Vis apush rod 37 The brake valve device 1 'may be oflanv `type .adapted-toinove-thecar door s.y f 'havng a, dO. 'Opening Aposition in which .Huid Theltreadle door vengine control valve device 9 .90 I y underfpressure is Supplied fo? Qpeningfth? doors lcomprises a casing, .whichrnay be` secured to the of a' Car- :For the-'purpoe of' {llutr'ftionuhow friser;38-of a car"`door. step 39.vr Said casing has a .ever' the brake? V?'1Ve.dev1ce 1 .15 Simllafr'm that' .chamber v40 containing adoor opening; valve 41 disclosed in my pendmg apphcationi'S-eriql NQ' anda spring.42 for urging` said valve to its seat,

'40 463387. med June 24219.?0 and 91.11.? th3t.p9.r1?1.on and another chamber 43 containing a door closing 95 of the brake valve devme 1S Shown m Section Wmo-h valve 44 .the chamber. 43 being openrto the ats pertinent-'to my invention" Thebrak valve mos here Vthrough apa'ssage45 The valves 4'1 device comprises a portion 11 for effectingas erv-v (124,. rded- Wth utedtems which en .ice application and a releaseof tne'brakes', anda En, ..ectmmber 46. Such. that the. Seating of 4 5 vrportion 12 operative simultaneously. with the gae'llrb S.. rin .42 Seats the valve 4% The rportion llfor controllingthe car doo rs and for .Yalve- 44 ,yp dgdwha u Wardlyxtnding .effecting an emergency application of the brakes .Va Y 15.P1`9V1 ,e 1 h l? ts th h the --as is fully described in the above mentioned vpendgssgtdsc7w mfel a dslldiy .in a lication.

:gfhOi-tion' 12 of ,the brakevglve' device 1. comdirection, seats valve 44 and unseatsvalve 41. 105 prises a rotary valve 13-contained in a chamber-14 Th? vali/6841 and 44 Il flay be arranged fOr 0D- comrnunicating through passage and pipe 15 with eration by a passenger 1n various ways, one of thereservoir 4, the rotary valve 13 being adapted which; asshown in the drawing, is by means of a to be turned by a handle 17 through the medium .treadle lohinged atone edge 48 to the car iloor 49, 5 5 of a stem 16. y j sothatrdownward movement ofthe treadle 10, due. 110

i co

to a passenger stepping thereon, acts through the stem 47 to seat valve 44 and unseat valve 41.

In operation, the treadle 10 is normally relieved of pressure by a passenger and is in the position shown in the drawing, in which position chamber 32 of the treadle door engine is open to the atmosphere through' pipe 50, valve chamber46 of the treadle'door control valve device 9, past the door closing valve 44 and through the atmospheric passage 45.

Fluid under pressure is supplied to the reservoir 4 in the usual manner and ilowk:I therefrom through pipe 15 to chamber 36 intermediate the door engine pistons 31 and'33; Due to the outer,v

face of the pistons 31 and`33 being subject to atmospheric pressure when the treadle 10 is in--its4 normal position, the pressure inchamber 36 acoting on the diierential areas of pistons 3l and 33 moves said pistons to the position shown in they door 8 isin the door flows througha port5l inthe rotary valve 13 tov al door opening passage 52 in the saine manneras fully described in my pending application hereinbefore mentioned.

With the brake valve devicey in the brakes applied door opening position, the fluid supplied to lpassage 52 ows throughpipe 53 to valve chamber 40' of the treadle door enginecontrol valve device 9. Now, if a passenger desires'A to get out of the car, he steps on the treadle 10 andthe resulting downward movement seats vvalve 44 to close the atmospheric connection to the doorjengine chamber 32. The seating of valve 44 unseats valve 41 and permitsfluid under pressure supplied from the brake valve device to flow from chamber 40 to chamber 46 and thence'through pipe 50 to piston chamber 32,. This balances the opposing iluid pressures acting on the piston 31, so that reservoir pressure in chamber 36 actingr on the small piston 33 moves said pistons toward the lright handand this movement transmitted through push rod 37 moves thedoor 8 from the door closed position A to the door open position B.

When the door 8 `is indoor open` position, the

passenger may get'out of the car an'd if there are several passengers, their'walking over the treadlel v1,0 holds it in the depressed position in Whichithe car door 8 iis'maintained'open fortheirexit. -I-lowever, upon removal'of the passengerspressure .or weight from the treadle 10, spring 42 -seatsthe door opening valve 41, unseats the door closing-,valve 44and raisesthe treadle 11,0.; The .unseating of valve.,44 permitsuid under-,pressuretobe .vented from the doory enginepis'to'n chamber 32. to ,the atmosphereand the pressure V,of iiuid in chamber 36 actingf'nfthe differential areasA ofpistons 31 and 33 then moves the door .enginepistons Bland 33 to their normal door closed position, and the car Vdoor 8 from the open position B to the closed position A. t

t It willbe ,evident that in order for alpassenger to openfthe car ydoor 8.by depressing treadle 16,

the brake'valve deviceimust be in the brakes applied door opening position so as to supply'iluid under pressure to the pipe' 53,` and thecardoor 'The selector" valvev device 2 is similar to that exhaust passage and p`ipej`54;

'trance'f'door engine opening pipe- 26" to piston fchamber 22 and at'the same time venting iluid 62 in 'thebrakevalve'rotary valve-13fand the atflows tothe'seat of the selector valve rotary valve disclosed inAPatentf'1,451,44l of Clyde C. Farmer,

tion, a lap position has been provided as shown nin Fig. 1, in` which position the door opening passage 52 is lappedA bythe rotary valve 30, so that if 95 the operator so desires, neither the entrance door 5r or exit door 6 will be opened by fluid supplied to passage 52 for permitting operation of the treadle door8jk When the selectorV valve device' 2i is inj lap position, ilui'djunder pressure4 is'fsupplied fromthe usual emergency pipe v55, through passage 56, cavity 57fin the selector 'va'lve rotary'valveO and doorv closing pipe 27to theentrance Adoor engine piston' chamber 24" and valso `frrom`-cavity 57 through'door closing pipe 2,9' tothe Aexit door engine piston chamber "24, Vtherebyho'ldingthe entrance door engine and exit door engines inthe door'closed positionsjsince Athefrespective door openingpipes 26 and 2 8 are bothlopen to the at- 110 mosphere through cavity 58v inthe selector valve rotary valve 30.an'dthe atmospheric passage and .If, when fluid under pressureis supplied tothe door opening passagej52,ltheoperator desires to .operate vthe entrance door engine, he turns the rotary'valve A30 to entrance doorcontr'ol position in Whichwthe connections tothe .exit door engine are maintained' as in jlap position, but the entrance door engine is operated by uid under pressure supplied from passage 52 through passage and pipe 26- to piston chamber f22j`up on the'venting of ,fluid under'pressure'from 'piston' chamber 24,

through pipe and passage 27, passage 61, 4cavity I 62 in the brake valver'otary valve y13 and exhaust 125 passage and'pipe 54. f j y l If the operator desiresonly to operate the exit door engine,theturns the' 4door .selector valve to yexit doorv control position, `in which the entrance Ydoor engine is maintained inclosed position as ian when theA selector valve lappositon, but the exit ldoor engine is operatedtluid under pressure suppliedfrompassage 52 through passage and pipe 28 to' piston chamber2l2lupon the vent- ',ingiof fluidunder pressure 'from piston chamber 2,4 ,throughv pipe and passage 29; passage 61, cavity'62r in .the brake ivalveurotary valve 13. `and If desired,V the selector "valve device vmay be vturned to entrahceand exit 'door control position, in Whichfboth door engines are operated by supplying fluid under t pressureI froinfpassage 52 to piston chamber 2 2 and alsovt'hrough the ent under pressure from therespectivepiston chambers 24 through pipes 29 and-27, passage 61, cavity mospheric passage and pipe 54.

It will be noted that as with the treadle door engine '7, the operation of the entrance door engine 5 and exit door engine 6 can only be effected when fluid under pressure is supplied to passage 52 by the brake valve device in the brakes applied door opening position.

While one illustrative embodiment of the invention has been described in detail, it is not my intention to limit its scope to that embodiment or otherwise than by the terms of the appended claims.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The combination with a brake valve device having a passageway and movable to a door opening position for supplying fluid under pressure to said passageway and to another position for venting fluid under pressure from said passageway, a door engine operated by fluid under pressure supplied to said passageway for opening the door of a car and operative upon the venting of said passageway to close said door, another door engine operated by fluid under pressure for opening another door of the car, and valve means operated ing position for supplying uid under pressure to said passageway and to another position for venting iuidY under pressure from said passageway. a door engine operated by fluid under pressure' supplied to said passageway for opening the door of a car and operative upon the venting of said passageway to close said door, another door engine operated by fluid under pressure for opening another door of the car and operative upon the venting of fluid under pressure for closing the other door ofthe car, a treadle controlled by a passenger, and valve means operative by said treadle when subject to manual pressure for supplying uid under pressure from said passageway to the second mentioned door engine and operative upon the relief of manual pressure on said treadle to vent fluid under pressure from the second mentioned door engine.

. Y JOSEPH C. MCCUNE. 

